*{
    padding: 0;
    margin: 0;
}
/* 浮动导航条 */
.nav{
    width: 100%;
    height: 66px;
    z-index: 1;
    background-color: rgba(17,17,17,0.75); 
    position: fixed;
    top: 0px;  
    background-image: url(../img/ys-logo.png);  
       /*  固定背景图*/
     /* background-position: 0px 100px; */
     /* 防止背景重复 */
     background-repeat: no-repeat;
     /* background-size: 200px 300px;*/
   
   

}
/* 音乐logo */
.music{
    width: 30px;
    height: 30px;
    margin-top: 18px;
    margin-left: 60px;
}

/* 导航文字 */
.nav-w{
    line-height: 66px;
    width: 610.188px;
    display: inline-block;
    vertical-align: top;
    margin-left: 227px;
}
.nav-w li{
   
    float: left;
    color: white;
    font-size: 17px;
    list-style: none;
    margin-right: 40px;
    margin-left: 10px;
    font-weight: bold;
    
}
li:hover{
    color: teal;
    
}
.nav span{
    font-size: 17px;
    font-weight: bold;  
    margin-left: 850px;
    color: white;
    position: relative;
    bottom: 6px;
}
.login{ 
    width: 27px;
    height: 27px;
    margin-left: 10px;
}


/* 主要内容 */
.main{
    height: 1990px;
    background-image: url(../img/background-green.jpg);
    background-repeat: no-repeat;
    
}
/* 三图区 */
.pic{
    width: 1280px;
    height: 700px;
    margin: auto;
    
}
.pic li{
    list-style: none;
    float: left;
}
.pic-1{
    width: 420px;
    height: 450px;
    background-color:rgba(18, 18, 18,0.8) ;
    box-shadow: 0px 3px 7px 0px rgba(0,0,0,0.35);
    position: relative;
    top:125px;
    list-style: none;
    vertical-align: top;
    margin-right: 10px;
    opacity: 0.9;
}

.pic-2{
    width: 420px;
    height: 450px;
    background-color:rgba(18, 18, 18,0.8);
    box-shadow: 0px 3px 7px 0px rgba(0,0,0,0.35);
    position: relative;
    top:125px;
    list-style: none;
    vertical-align: top;
    opacity: 0.9;

}

.pic-img img{
    width: 380px;
    height: 190px;
    margin: 20px;

}
.pic-w{
    width: 380px;
    height: 68px;
    font-size: 25px;
    margin-left: 20px;
    color: white;
}
.date{
    height: 25px;
    margin: 20px;
    margin-top: 107px;
    color: white;
   
    
}
.date span{
    width: 100px;
    height: 25px;
    margin: 20px;
    margin-left: 250px;
    color: orange;

    
    
}
.under-box{
    
    height: 1290px;
    background: url(../img/ysbj.jpg);
    background-size: cover;
    
    background-repeat: no-repeat;
   
}
.nav-box{
    height: 108px;
    width: 1280px;
    margin: auto;
}
.nav-box-1{
    width: 155px;
    line-height: 36px;
    background-color:rgb(47, 57, 51) ;
    list-style: none;
    margin-right: 25px;
    margin-top: 36px;
    float: left;
}
.nav-box-1:hover{
    background-color: mediumseagreen;
}
.nav-box-1 h3{
    color: orange;
    margin-left: 55px;
    font-size: 20px;
}
.nav-box-2{
    width: 155px;
    line-height: 36px;
    background-color:rgb(207, 207, 208) ;
    list-style: none;
    margin-right: 25px;
    margin-top: 36px;
    float: left;
}
.nav-box-2:hover{
    background-color: mediumseagreen;
}
.nav-box-2 h3{
    margin-left: 55px;
    font-size: 20px;
}
/* 五个小盒子 */
.pic-box{
    height: 176px;
    width: 1286px;
    margin: auto;
    background-color: white;
    margin-bottom: 10px;
}
.pic-box:hover{
    box-shadow: 5px 5px 10px gray;
}
.pic-box1{
    width: 265px;
    height: 130px;
    display: inline-block;
}
.pic-box2{
    width: 984px;
    height: 130px;
    display: inline-block;
    vertical-align: top;

}
.pic-box1 img{
    width: 265px;
    height: 130px;
    margin: 23px 23px 23px 23px;
    display: inline-block;
}
.pic-box2 h1{
    width: 955px;
    height: 31px;
    display: inline-block;
    vertical-align: top;
    margin-top: 23px;
    margin-left: 23px;
}
.pic-box2 p{
    width: 300px;
    line-height: 19px;
    display: inline-block;
    font-size: 16px;
    margin-left: 800px;
    margin-top: 80px;
    
}
.pic-box2 p span{
    margin-left: 30px;
    color: orange;

}
/* 小尾巴 */
.under-footer{
    background-color: rgb(92, 94, 98);
    width: 1280px;
    height: 40px;
    margin: auto;
    margin-top: 40px;
}
.under-footer h1{
    margin-left: 570px;
    font-size: 25px;
    line-height: 40px;
}
/* 上尾巴 */
.footer-1{
    width: 1903px;
    height: 52px;
    background-color:rgb(17, 17, 17);
    margin-top: 132px;
    text-align: center;
}
.footer-1 img{
    width: 32px;
    height: 32px;
    margin-right: 32px;
    margin-top: 10px;
    opacity:0.5;
    
}



/* 尾部 */
.foot{
    width: 1903px;
    height: 343px;
    background-color: black;
}
.foot1{
    width: 300px;
    height: 293px;
    
    display: inline-block;
    line-height: 293px;
    margin-left: 300px;
    margin-top: 25px;
}
.foot-pic1 {
    width: 120px;
    height: 42px;
}
.foot-w{
    width: 30px;
    height: 28px;
    position: relative;
    bottom: 5px;

}
.foot-pic2 {
    width: 110px;
    height: 80px;
    position: relative;
    top: 20px;
}
.foot2{
    width: 1295px;
    height: 343px;
    
    display: inline-block;
    vertical-align: top;
}
.foot2-1{
    width: 882px;
    height: 52px;
    margin-top: 25px;
    padding-left: 30px;
}
.foot2-1 li{
    list-style: none;
    float: left;
    line-height: 52px;
    color: gainsboro;
    font-weight: bold;

}
.foot2-2{
    width: 882px;
    height: 160px;
    padding-left: 30px;
    padding-top: 10px;
}
.foot2-2 li{
   height: 25px;
    list-style: none;
    font-size: 14px;
    color: gainsboro;
}
.foot3-3{
    width: 800px;
    height: 76px;
    margin-top: 20px;
    padding-left: 40px;
    
}
.foot3-3 li{
    float: left;
    list-style: none;
}
.foot--{
    width: 1930px;
    height: 40px;
    background-color: rgb(17, 17, 17);
}